/Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpressionStrata.h
class UMaterialExpressionStrataHazinessToSecondaryRoughness : public [UMaterialExpressionStrataUtilityBase](API\Runtime\Engine\Materials\UMaterialExpressionStrataUtility-)
FExpressionInpu...
BaseRoughness
The base roughness of the surface. It represented the smoothest part of the reflection.
FExpressionInpu...
Haziness
Haziness represent the amount of irregularity of the surface.